304513040 has 40 divisors (see below), whose sum is σ = 762456408. Its totient is φ = 112435200.

The previous prime is 304513039. The next prime is 304513063. The reversal of 304513040 is 40315403.

It can be written as a sum of positive squares in 4 ways, for example, as 21196816 + 283316224 = 4604^2 + 16832^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145361 + ... + 147440.

Almost surely, 2^304513040 is an apocalyptic number.

It is an amenable number.

304513040 is an abundant number, since it is smaller than the sum of its proper divisors (457943368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

304513040 is a wasteful number, since it uses less digits than its factorization.

304513040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292827 (or 292821 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 304513040 is about 17450.3020031173. The cubic root of 304513040 is about 672.7731205002.

Adding to 304513040 its reverse (40315403), we get a palindrome (344828443).

The spelling of 304513040 in words is "three hundred four million, five hundred thirteen thousand, forty".